Boiler.



PATBNTED APR, 14, 190s.

.BAGGALEY- BOILER. APPLIATION FILED NQV. 20, 1902.

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www ww? www INVENTOR WITNESSES PATENTED APR, 14, 1940s.

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R. BAGrGrALl-ICY.l

BOILER.

APPLICATION FILED Nov. 2o, 1902.

MERITS-#5112313.

N0 MODEL.

INVENTOR wrm Ess'ss i of the boiler-shell.

UNITED STATES RALPH BAGGALEY, OF PITTSBURG, PENNSYLVANIA.

BOILIER.

SPECIFICATION forming part of Letters Patent No. 725,392, dated April 14, 1903.

Application filed November 20, 1902. Serial N0 1321131- (N0 HIGSL) To @ZZ whom it may concern,.-l

Be it known that I, RALPH BAGGALEY, of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Boiler, of which the following is a full, clear, and enact description, reference being had to the accompanying drawings, in which- Figure l is a longitudinal section of a boiler embodying my invention. Fig. 2 is a crosssection thereof. Fig. 3 is a partial plan view showing the slag-feeding spout and a portion Fig. 4 is a' detail sectional side elevation, on a larger scale, showing the irlieans I employ to effect the'discharge of the s ag. l

My invention relates to an improvement on the boiler claimed in an application of Oliver S. Garretson, iiled November 20, 1902,' Serial No. 132,109.. That application showsa rotary steam-boiler having tubes or receptacles eX- tending into the water-space and adapted to f receive molten slag, the heat of which is communicated to the Water through the tubes,

As the boiler rotates and the slag-tubes are inverted the congealed slag is discharged.

My invention consists, first, in providing such boiler with gutters which connect the, tubes of each row with the corresponding tubes of the adjacent row. These gutters serve to direct the molten slag into the tubes when it is poured upon the surface ofthe boiler and cause the slag which failsv to Arun into or which overflows from any tube to flow into the next succeeding tube.

The second feature of my invention consists in the use of means for insuring'the free discharge of the slag from the inverted tubes.

My investigations have shown, particularly with silicate-of-lime slags, that the slag is apt tocoolin concentriclayers,and thushas'a tendency to bind in the tubes, so that means other than gravity alone must'be employed in order to insure its certain discharge. I therefore provide opposite to the place of discharge a row of pipes or nozzles adapted to direct into the tubes jets, under pressure, of air, steam, or Water, preferably the latter, which striking the congealed but still hot slag, will` cause it to shrink or disintegrate and to drop in pieces from the tubes. The pressure at which the jets are applied may, if necessary, be high enough to wash the fractured or disintegrated slag mechanically from the tubes irrespective of the action of gravity, th'e purpose being to clean the tubes of congealed slag and to leave them free to be recharged when they next come opposite to the spout or runner from which the molten slag is poured.

A third feature of my invention consists in applying to a rotarysteam-boiler asteam and Water colu n, which communibates with the Water-space and also communicates through the trunnions with the steam-space of the boiler. A water-gage is applied to this column and affords reliable means for Watching the level of the Water in order to prevent it at any time from falling so low as to expose any part of the slag-tubes Without Water protection to the corrosive action of the hot slag.

These features of my invention are of practical importance and obviate difficulties which otherwise might at times cause serious trouble. They contribute greatly to the success of the boiler, especially when used with certain slags. l

Referring now to the drawings, the boiler is preferably composed of sections 2 2 and 3,

having openings 4:, in which the tapering slagtubes, 6', and 7 are inserted and secured by expanding their outer ends. These slagtubes taper and are closed at their inner 4smaller ends, being inserted lradially in the boiler. I prefer to employ several sets of tubes of dierent lengths, so that a large number of them can be arranged in the boiler,

and for` the purpose of bracing the longer tubes 5 6 laterally I prefer to employ annular bracing-shells 8, concentric with the sections 2 2 and held therein by annular 'brackets or anges 9. The tubes project through these shells and are Abraced thereby, but are free to expand and contract longitudinally. The steam-section 3 is of greater diameter than the sections 22 and may be clamped thereto by flanges l0 and bolts ll, and the ends or heads 12 of the boiler may be similarly secured to the endsof the sections 2 2 and may be formed with strengthening-iianges l2. The boiler thus constitutedis supported on a cradle composed of rollers or wheels 13, bearing upon annular rims or tires 1l, which may be applied to the boiler-shell, preferably to the iianges thereof, or the rollers may be caused lWhichfmay be steel castings or'plate metal,

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to bear directly upon suitable portions of the boiler-shell itself. These rollers render the boiler rotary on its longitudinal axis, and for the purpose of rotating it or controlling its 'speed of rotation the boiler-shell is provided with an ann ular series of gear-teeth 15, meshing with a pinion 16, connected by worm-v r 18 is the feed-water pipe, and 19 is the steam- 4 eduction pipe, which extends from the steamspace S in the section 3 into the steam-space of a steam and water column 2O and has a.v

drain-pipe 2l for removing Water of condensation. The water-space of the column 2O is connected with the boiler by a pipe 23,

`located in the axial line of the boiler.

through which the pipe 19 passes. The pipes Y 'f 18 and 19 do not rotate with the boiler, but

are fixed and pass through stuffing-boxes 22, The column 2O has'a steam-eduction pipe 21' and is provided with a water-gage 24, at which the level of water in the boiler may be observed. important that it should be` high enough to lill the boiler-sections 2 .2 and to keep the slag-tubes 5, 6, and 7 submerged throughout,

their length. The use o'f the sec-tion 3, of larger diameter, enables 4me to maintain silch water-level and at'the same time to alkord a sucient steam-space S in the upper portion 'of the boiler.-

To supply the slag-tubes with slag for the purpose of heating the water, I employ a spout 25, through which molten slag may be poured from a ladle or discharged from the furnaces. Its delivery is somewhat above the horizontal axis of the boiler,l and it has a series of'gutters 25', one for each of the rows of tubes, situated directly above short gutters 26, which are formed on the boiler- -shell between the openings of the tubes, so that the slag which fails to run into or over- ,flows from one tube will ow into the next succeeding one. These gutters, as above stated, are of my invention.

The operation is as follows: The boiler having been filled with water to the normal water-level is rotated slowly in the direction of the arrow-say at the rate of one ,revolution per hour, more or less-and slag is charged into the spout 25 and flows from the gutters 25' into the open ends of the tubes. Each line of tubes as it comes opposite to the slag-- spout receives a charge of slag, which communicates its heat to the water through the In regulating the water-level it is 1 walls of the tubes and solidliies and shrinks therein, so that the congealed body is of less cross-section than the bore of its tube.l As the tubes reach the level of the axis of the boiler on the opposite side from the slagspout they come opposite-to a shield27, which extends concentrically with the periphery of the `boiler to a slag-discharge chute 28, at which it terminates. This shield prevents the solidified blocks of slag from dropping prematurely; but when they reach the discharge 28 they drop from theV tubes and .fall into a suitable receptacle or convcyer. When certain kinds of slag are used,jit is necessary to facilitate its discharge and dislodge it forcibly from the tubes.

water, or' steam, preferably water. Such pipe has a valve 30, which as the tubes come in succession opposite to the pipe is engaged by a projection 31 on the boiler or vis otherwise opened automatically and discharges a cool- For this purpose. I set opposite to each circular line -of tubes a jet-pipe 29,'connected with a source of air,

ing jet into the mouth of the tube-against the slag.

wise and shuts olf-the jet; but, it desired;

the valves may be dispensed with and the jets rendered continuous.

b e used as a driving-motor at the beginning of the operation when the tubes are empty, for when the tubesare filled withslag, there being more charged tubes on one side of the.l

boiler than on the other or slag-disharge side, the boiler will be rotated by the weight of the slag andthe engine need only be employed to regulate the speed of rotation.

Within the scope of my invention as de-l fined inthe claims the skilled mechanic may vary the construction in manyways, since What I claim isl 1. A steam-boiler. having a rotary boilershell, slag Atubes or receptacles extending thereinto and adapted to receivemolten slag, and gutters connecting the mouths of succeeding tubes and adapted to conduct slag which overflows from or fails to enter one tube and to cause it to enter the next; substantially as described.

2. A steam-boiler having 'a rotary boilershell, slag tubes or receptacles extending thereinto and adapted to receive molten slag,

gutters connecting the mouths of the tubes,A

and a spout adapted to deliver .the slag to the tubes; substantially as described.

3. A steam-boiler having slag receptacles, or tubes adapted to be inverted for discharge of the slag, and-means for dislodgiug the slag from the receptacles or tubes; `substantially as described. V

4. A steam-boiler having slag receptacles The rapid contraction of the slag whichvv this occasions causes it to drop in pieces fromV ,the tube into the chute, and its discharge is The motor for rotating the boiler need only v IIO or tubes adapted to be inverted fordischarge ofthe slag, and pipes adapted to deliverjets of fluid into t-he tubes to dislodge the slag space through the axis of the boiler; substantially as described. y

7. A rotary steam-boiler having slag receptacles or tubes and having a steam and water zo column,communicating with the water-space, and also communicating with the steamspace through the axis of the boiler, and a water-gage applied to the steam and Water column; substantially as described. 25

In testimony whereof I have hereunto set my hand.

RALPH BAGGALEY.

Witnesses:

GEO'. B. BLEMING, JOHN MILLER. 

